<template>
  <h4>当前求和为：{{ sum }}</h4>
  <button @click="sum++">点我++</button>
  <hr>
  <h2>姓名：{{ name }}</h2>
  <h2>年龄：{{ age }}</h2>
  <h2>薪资：{{ job.j1.salary }}</h2>
  <h3 v-show="person.car">座驾信息：{{ person.car }}</h3>
  <button @click="name += '~'">修改姓名</button>
  <button @click="age++ ">增长年龄</button>
  <button @click="job.j1.salary++">涨薪</button>
  <button @click="showRawPerson">输出最原始的person</button>
  <button @click="addCar">给人添加一台车</button>
  <button @click="person.car.name +=  '!'">换车名</button>
  <button @click="changePrice">换价格</button>
</template>

<script>
import {ref, reactive, toRefs, toRaw, markRaw} from 'vue'
export default {
  name: 'Demo',
  //数据
  setup(){
    //数据
      let sum = ref(0)
      let person = reactive({
      name: '张三',
      age: 18,
      job: {
          j1: {
              salary: 20
          }
      }
    })

    function showRawPerson(){
      const p = toRaw(person)
      p.age++
      console.log(p);
    }

    function addCar(){
      let car = {name: '奔驰', price: 40}
      person.car = markRaw(car)
    }

    function changePrice(){
      person.car.price++
      console.log(person.car.price);
    }

   
    //返回一个对象（常用）
    return {
      sum,
      person,
      ...toRefs(person),
      showRawPerson,
      addCar,
      changePrice
    }
  }
}
</script>

